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This article reviews the impact of nutritional deficiencies on hair health, detailing how they can cause structural abnormalities, pigmentation changes, or hair loss; it presents no new clinical findings.

This review explores the role of hormones in pilosebaceous units and associated skin disorders, focusing on androgen action, without presenting new clinical findings.

This guideline review discusses current symptoms, diagnostic approaches, and treatments for Long- and Post-COVID, based on today's knowledge, and emphasizes its practical application with ongoing updates as new insights emerge.

This study found that the retinoid all-trans retinoic acid induced a catagen-like stage in human scalp hair follicles, suggesting upregulation of TGF-beta2 as a contributing mechanism.

This review discusses the genetic factors involved in hair follicle morphogenesis and cycling and reports no new clinical results; it emphasizes the role of genes in hereditary hair diseases.

This review explores the role of Foxn1 in mammalian skin biology, discussing its influence on hair follicle function and the potential for further research to enhance understanding of epithelial differentiation.

This review identified distinguishing features of adult Kawasaki Disease compared to pediatric cases, noting more favorable prognosis in adults with fewer cardiovascular complications and no fatalities, although it remains a rare and often unrecognized condition.

This review classifies mutant mice with hair abnormalities into six categories, providing an annotated table that serves as a reference for understanding the molecular controls of hair growth.

This review highlights various methods of stem cell communication that reflect the unique organization and function of different tissues and reports no new results.

This article addresses the need to screen for nutrient deficiencies in patients with hair loss but reports no new findings, noting that supplementation without deficiency may not be beneficial and could pose risks.

This review summarizes 15 years of clinical and experimental research advancements in hidradenitis suppurativa, highlighting its recognition as a uniquely healable inflammatory skin disease but reports no new clinical results.

This study found that mice lacking the Sept4/ARTS gene had more hair follicle stem cells and improved wound healing, suggesting apoptosis regulation as a potential target in regenerative medicine.

This study demonstrates that YAP and TAZ are essential for initiating basal and squamous cell carcinomas in mice, and suggests targeting these pathways could be beneficial for treating skin cancers.

This review examines the role of Hairless, a nuclear receptor corepressor, in regulating Wnt signaling during hair cycling and reports no new clinical results.

This study found that mTOR signaling plays a crucial role in activating hair follicle stem cells by balancing BMP-mediated repression, essential for hair regeneration.

This review discusses how changes in hair and skin may indicate underlying vitamin deficiencies and emphasizes the need to identify populations at risk for these deficiencies; it reports no new results.

This study discusses the potential of targeting 11β-HSD1 for treating metabolic syndrome and highlights emerging promising data from human trials on selective 11β-HSD1 inhibitors.

Vitamin D3 affects cell differentiation in specific skin areas.

In this study, three patients with extensive alopecia areata showed varying degrees of hair regrowth after 20 weeks of treatment with ustekinumab, a cytokine-targeting therapy.

This review examines the role of nuclear hormone receptors in skin wound repair processes and reports no new clinical results, highlighting the importance of their interaction with skin cells for effective healing.

This study reported that a three-dimensional hydrogel culture system supports the growth and maintenance of distinct dermal papilla cell types, crucial for skin reconstitution assays in neonatal mice.

This study found that overexpression of the mineralocorticoid receptor in a mouse model led to premature epidermal barrier development, keratinocyte apoptosis, and postnatal alopecia, indicating new roles for MR signaling in skin physiology.

These guidelines review the management of complications and specific forms of congenital ichthyosis and report no new results; they summarize expert and evidence-based recommendations for clinicians.

This study suggests that decreased SHBG levels and increased FAI, free testosterone, and DHEAS concentrations are effective in diagnosing PCOS in epidemiological studies of women of reproductive age.

This review found that patients with alopecia areata may have lower levels of vitamin D, zinc, and folate, but conflicting evidence precludes definitive clinical recommendations for micronutrient supplementation.

This study found that low serum ferritin and vitamin D2 levels are associated with hair loss in females with chronic telogen effluvium and female pattern hair loss, suggesting potential benefits of screening and supplementation.

This study found that DNA strand segregation in multipotent hair follicle stem cells occurs randomly during development and tissue homeostasis, challenging the immortal strand hypothesis.

This review discusses the multiple layers of environmental controls on hair stem cell homeostasis and suggests that targeting these layers could offer safer regenerative medicine therapies without directly using stem cells.

This review evaluates various kits for isolating platelet-rich plasma using established processing standards and finds they enable compliance with consensus quality criteria; ongoing research is needed to refine these procedures for improved consistency and safety.

This study found that women with androgenetic alopecia reported more psychosocial problems and lower self-esteem than women with non-visible skin conditions and men with androgenetic alopecia, which they attributed to their hair loss.